Study of Medium Energy Heavy Ion Reactions with Quantum Mechanical Simulations

1. 弹丸破片的动量分布研究：通过结合核子-簇碰撞过程，我们可以在费米能量区再现弹丸破片的动量分布，这种动量分布看起来符合弹丸-观众模型。核子和碎片的流动研究：利用软的Gogny力和硬的SKG2力研究了^<12>C+^<12>C和^<40>Ar+^<27>Al中舅舅子和碎片的流动。前者可以很好地再现数据，而后者则不行。计算结果对中神经网络截面的依赖性较弱。理论再现了观察到的趋势，即更大的碎片有更大的流量。^<40>Ar+^<27>Al的聚结机制比^<12>C+^<12>C的聚结机制更重要。3 .中能质子非弹性散射的研究：在p+^<12>C和p+^<58>Ni中，中能质子非弹性散射的双微分截面用amd得到了很好的再现。将DELTA自由度纳入AMD理论：构建了包含DELTA自由度的AMD计算机代码。用新代码成功地研究了800 MeV下p+^<12>C的非弹性散射。

1. Study of momentum distribution of projectile fragments : By incorporating nucleon-cluster collision process, we could reproduce momentum distribution of projectile fragments in the Fermi energy region which looks like obeying the projectile-spectator model.2. Study of flow of nucleons and fragments : Flow of uncleons and fragments in ^<12>C+^<12>C and ^<40>Ar+^<27>Al was studied by the use of the Gogny force which is soft and the SKG2 force which is stiff. The former reproduces data well while the latter does not. The calculated results depend only weakly on the in-medium NN cross sections. Theory reproduced the observed tendency that larger fragments have larger flow. The coalescence mechanism is more important in ^<40>Ar+^<27>Al than in ^<12>C+^<12>C.3. Study of proton inelastic scattering at medium energies : Double differential cross sections of inelastically scattered protons at medium energies in p+^<12>C and p+^<58>Ni were reproduced well with AMD.4. Inclusion of DELTA degrees of freedom into the AMD theory : AMD computer code including DELTA degrees of freedom was constructed. p+^<12>C inelastic scattering at 800 MeV was studied successfully with the new code.